通过扩散系数的测量,可以了解高分子聚合反应整个过程的机理,进而控制聚合反应的进程。但能够测量高分子聚合过程中自扩散系数变化的仪器并不多。当前,加脉冲梯度场的自旋回波法被认为是最为有效和实用的方法,此项研究围内尚未报道。 By measuring the diffusion coefficient, the mechanism of the whole polymerization process of the polymer can be understood and the progress of the polymerization reaction can be controlled. However, there are not many instruments capable of measuring the self-diffusion coefficient changes during polymer polymerization. At present, the spin echo method with pulsed gradient field is considered as the most effective and practical method, which has not been reported in this study.